Ensure that the TextServices object which implements IME for Windows 7/8 ASH gets window activation…

Ensure that the TextServices object which implements IME for Windows 7/8 ASH gets window activation notifications on Windows 7.

This ensures that the IME composition window shows up in the correct place while typing.

BUG=421980
Committed: https://crrev.com/2b628ae2ef33a0ffaa89e7522125b807186b3c69
Cr-Commit-Position: refs/heads/master@{#299229}

[ananta, 2014-10-11 00:43:42]

ananta@chromium.org changed reviewers:
+ cpu@chromium.org

[cpu_(ooo_6.6-7.5), 2014-10-11 01:47:52]

lgtm

[cpu_(ooo_6.6-7.5), 2014-10-11 01:47:57]

The CQ bit was checked by cpu@chromium.org

[commit-bot: I haz the power, 2014-10-11 01:49:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/646123002/1

[commit-bot: I haz the power, 2014-10-11 01:55:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-11 01:56:18]

Patchset 1 (id:??) landed as
https://crrev.com/2b628ae2ef33a0ffaa89e7522125b807186b3c69
Cr-Commit-Position: refs/heads/master@{#299229}